WiFi WCA735M Bluetooth Combo Module Instruction Manual
- June 6, 2024
- WiFi
Table of Contents
WiFi WCA735M Bluetooth Combo Module
Introduction
WCA735M is a Wi-Fi / Bluetooth Combo module compliant with IEEE802.11 a.b.g.n.ac MAC/baseband/radio and Bluetooth 5.0 optimized for low-power applications. The core chipset is from MediaTek part number MT7668AUN.
Hardware Architecture
Main Chipset Information
| Item | Vendor | Part Number |
|---|---|---|
| IEEE802.11 a.b.g.n.ac mac/baseband/radio Bluetooth 5.0 | **** |
MediaTek
| ****
MT7668AUN
Operational Description
WCA735M is the 802.11a/b/g/n /ac +Bluetooth 5.0 Combo Module that acts as a
communication controller for users of a wireless device to connect to SMART TV
Features
- IEEE 802.11ac Draft compliant.
- Dual-band 2.4GHz /5 GHz
- Dual-stream spatial multiplexing up to 600Mbps data rate
- Support 20, 40, 80MHz channel with optional SGI(256QAM modulation)
- On-chip power amplifiers and low –noise amplifiers for both bands
- Complies with Bluetooth Core Specification Version 5.0
- Supports BT/Wi-Fi coexistence.
- Adaptive frequency hopping (AFH) for reducing radio frequency interference
Timebase of the RF frequency
For IF and RF frequency, a 40MHz crystal is a clock reference.
**Synthesizer
** Synthesizer inside Transceiver. Internal voltage controlled oscillator
(VCO) provides the desired LO signal base on the phase-locked loop (PLL) with
a relatively wide tuning range for this application. Internal fractional nPLL
allows support for a wide range of reference clock frequencies
Wi-Fi Transmission
Baseband data is modulated and up converted to the 2.4GHz ISM and 5-GHz
U-NII bands, respectively. Linear on chip power amplifier are included, which
are capable of delivering high output powers while Meeting IEEE802.11ac and
IEEE802.a/b/g/n specifications without the need for external PAs. When using
the internal PAs, closed-loop output power control is completely integrated.
Base-band Processing (BBP) IC has DSSS (BPSK/QPSK/CCK) and OFDM
(BPSK/QPSK/16QAM/64QAM/25QAM) modulation function, it provides transmission
data rate are 1, 2, 5.5, 11Mbps on DSSS and 6, 12, 18, 24, 36, 48, 54 Mbps on
OFDM. Digital data signal will be converted to analog (TX IQ) signals through
DAC in BBP IC, TX IQ pass through to low pass filter. TX I/Q signal use direct
conversion (zero-IF) architecture converter to generate carrier frequency
signal. Transceiver IC and internal PA magnify output power.
Wi-Fi Receiver
The MT7668AUN has a wide dynamic range, direct conversion receiver that
employs high-order on-chip
channel filtering to ensure reliable operation in the noisy 2.4GHz ISM band or
the entire 5GHz U-NII band
.Control signals are available that can support the use of optional LNAs for
each band,which can increase the receive sensitivity by several decibels.
Reverse direction isolation of LNA inside Transceiver IC suppresses unwanted
radiation. Then RF signal will be directly down to IF signal (RX IQ) and high-
frequency spurious emissions are suppressed by LPF. At last RX IQ signal will
be demodulated digital data.
Bluetooth Low Energy
The WCA735M support the Bluetooth 4.2 LE and 5.0 BLE 2Mbps
Link Control Layer
The link control layer is part of the Bluetooth link control functions that
are implemented in dedicated logic in the link control unit (LCU). Each task
performs a different state in the Bluetooth Link Controller.
Wideband speech
The WCA735M provides supports for wideband speech (WBS) using on-chip
SmartAudio technology. The WCA735M can perform modified Sub Band Codec (mSBC)
encoding and decoding of linear 16bitsat 16kHz(256kbps rate) transferred over
USB interface.
Adaptive Frequency Hopping
The WCA735M gathers link quality statistics on a channel-by basis to
facilitate channel assessment and Channel map selection. The link quality is
determined using both RF and baseband signal processing to Provide a more
accurate frequency-hop map.
Product Details
Data Modulation
- DSSS:CCK,BPSK,QPSK for 802.11b
- OFDM:BPSK,QPSK,16QAM,64QAM,256QAM for 802.11a,g,n,ac
- FHSS:GFSK,OQPSK, 8DPSK, π/4DPSK for Bluetooth
Frequency Range
- 2400-2497MHz
- 5150-5350MHz 5470
- 5725MHz 5725
- 5825MHz
IEEE 802.11n HT20
IEEE 802.11n HT40
IEEE 802.11ac
Output Power tolerance
Output power ± 1.0dBm
Simultaneous transmission
| BT| BT LE| 2.4GHz Wi-Fi| 5GHz Wi-Fi
---|---|---|---|---
BT| | O| O| O
BT LE| O| | O| O
2.4GHz Wi-Fi| O| O| | X
5GHz Wi-Fi| O| O| X|
Recommended Operating conditions
| Min| Typ.| Max| Unit
---|---|---|---|---
Operating voltage| 4.5| 5| 5.5| V
Operating temperature(ambient)| -20| 25| 50| °C
AS Information
- Company Name: CHENGDU XUGUANG TECHNOLOGY CO., LTD. Fax: +86-28-84841628
- Tel: +86-28-84841628
- Add: 2 sections of park road Longquanyi Chengdu China
Certification Information
- Name(Model name):
- Certification ID:
- Company Name:
- Production date
- Vendor:
FCC MODULAR APPROVAL INFORMATION EXAMPLES for Manual
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:
- This device may not cause harmful interference.
- This device must accept any interference received, including interference that may cause undesired operation.
CAUTION:
Changes or modifications not expressly approved by the party responsible
for compliance could void the user’s authority to operate the equipment.
NOTE:
This equipment has been tested and found to comply with the limits for a Class
B digital device, pursuant to Part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against harmful interference in a
residential installation. This equipment generates uses and can radiate radio
frequency energy and, if not installed and used in accordance with the
instructions, may cause harmful interference to radio communications. However,
there is no guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off and
on, the user is encouraged to try to correct the interference by one or more
of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help.
FCC Radiation Exposure Statement:
This equipment complies with FCC radiation exposure limits set forth for an
uncontrolled environment. This equipment should be installed and operated with
a minimum distance 20cm between the radiator & your body.
OEM INTEGRATION INSTRUCTIONS:
This device is intended only for OEM integrators under the following
conditions: The module must be installed in the host equipment such that 20 cm
is maintained between the antenna and users, and the transmitter module may
not be co-located with any other transmitter or antenna. The module shall be
only used with the internal onboard antenna that has been originally tested
and certified with this module. External antennas are not supported. As long
as these 3 conditions above are met, further transmitter test will not be
required. However, the OEM integrator is still responsible for testing their
end-product for any additional compliance requirements required with this
module installed (for example, digital device emissions, PC peripheral
requirements, etc.). The end-product may need Verification testing,
Declaration of Conformity testing, a Permissive Class II Change or new
Certification. Please involve an FCC certification specialist in order to
determine what will be exactly applicable for the end product. Validity of
using the module certification:
In the event that these conditions cannot be met (for example certain laptop configurations or co-location with another transmitter), then the FCC authorization for this module in combination with the host equipment is no longer considered valid and the FCC ID of the module cannot be used on the final product. In these circumstances, the OEM integrator will be responsible for re-evaluating the end product (including the transmitter) and obtaining a separate FCC authorization. In such cases, please involve a FCC certification specialist in order to determine if a Permissive Class II Change or new Certification is required. Upgrade Firmware: The software provided for firmware upgrade will not be capable to affect any RF parameters as certified for the FCC for this module, in order to prevent compliance issues.
End product labeling:
This transmitter module is authorized only for use in device where the
antenna may be installed such that 20 cm may be maintained between the antenna
and users. The final end product must be labeled in a visible area with the
following: “Contains FCC ID: A3LWCA735M”.
Information that must be placed in the end user manual:
The OEM integrator has to be aware not to provide information to the end
user regarding how to install or remove this RF module in the user’s manual of
the end product which integrates this module. The end user manual shall
include all required regulatory information/warning as show in this manual.
FCC MODULAR APPROVAL INFORMATION EXAMPLES for Manual
This device complies with Part 15 of the FCC Rules. Operation is subject to
the following two conditions:
- This device may not cause harmful interference.
- This device must accept any interference received, including interference that may cause undesired operation.
CAUTION
Changes or modifications not expressly approved by the party responsible
for compliance could void the user’s authority to operate the equipment.
NOTE:
This equipment has been tested and found to comply with the limits for a Class
B digital device, pursuant to Part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against harmful interference in a
residential installation. This equipment generates uses and can radiate radio
frequency energy and, if not installed and used in accordance with the
instructions, may cause harmful interference to radio communications. However,
there is no guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off and
on, the user is encouraged to try to correct the interference by one or more
of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help.
WARNING
Changes or modifications not expressly approved by the manufacturer could
void the user’s authority to operate the equipment.
“CAUTION :
Exposure to Radio Frequency Radiation. Antenna shall be mounted in such a
manner to minimize the potential for human contact during normal operation.
The antenna should not be contacted during operation to avoid the possibility
of exceeding the FCC radio frequency exposure limit.
IC Information
This device complies with Industry Canada license-exempt RSS standard(s).
Operation is subject to the following two conditions:
- this device may not cause interference, and
- this device must accept any interference, including interference that may cause undesired operation of the device.
The end product must be labeled to display the Industry Canada certification number of the module. Contains transmitter module IC: 649E-WCA735M This device is going to be operated in 5 150 MHz ~ 5 250 MHz frequency range, it is restricted in indoor environment only.
Information for OEM Integrator
This device is intended only for OEM integrators under the following
conditions:
- The antenna must be installed such that 20 cm is maintained between the antenna and users, and
- The transmitter module may not be co-located with any other transmitter or antenna.
End product labelling
The label for end product must include “Contains FCC ID: A3LWCA735M,
Contains IC: 649E-WCA735M”.
“CAUTION:
Exposure to Radio Frequency Radiation. This equipment complies with FCC
radiation exposure limits set forth for an uncontrolled environment. This
equipment should be installed and operated with minimum distance of 20cm
between the radiator and your body. This transmitter module is authorized only
for use in device where the antenna may be installed such that 20 cm may be
maintained between the antenna and users.”
Requirement per KDB996369 D03
List of applicable FCC rules
List the FCC rules that are applicable to the modular transmitter. These
are the rules that specifically establish the bands of operation, the power,
spurious emissions, and operating fundamental frequencies. DO NOT list
compliance to unintentional-radiator rules (Part 15 Subpart B) since that is
not a condition of a module grant that is extended to a host manufacturer. See
also Section 2.10 below concerning the need to notify host manufacturers that
further testing is required.3 Explanation: This module meets the
requirements of FCC part 15C(15.247). part 15E(15.407)
Summarize the specific operational use conditions
Describe use conditions that are applicable to the modular transmitter,
including for example any limits on antennas, etc. For example, if point-to-
point antennas are used that require reduction in power or compensation for
cable loss, then this information must be in the instructions. If the use
condition limitations extend to professional users, then instructions must
state that this information also extends to the host manufacturer’s
instruction manual. In addition, certain information may also be needed, such
as peak gain per frequency band and minimum gain, specifically for master
devices in
5 GHz DFS bands. Explanation: The EUT has a Chip Antenna, and the antenna
use a permanently attached antenna which is not replaceable.
Limited module procedures
If a modular transmitter is approved as a “limited module,” then the module
manufacturer is responsible for approving the host environment that the
limited module is used with. The manufacturer of a limited module must
describe, both in the filing and in the installation instructions, the
alternative means that the limited module manufacturer uses to verify that the
host meets the necessary requirements to satisfy the module limiting
conditions. A limited module manufacturer has the flexibility to define its
alternative method to address the conditions that limit the initial approval,
such as: shielding, minimum signaling amplitude, buffered modulation/data
inputs, or power supply regulation. The alternative method could include that
the limited module manufacturer reviews detailed test data or host designs
prior to giving the host manufacturer approval.
This limited module procedure is also applicable for RF exposure evaluation
when it is necessary to demonstrate compliance in a specific host. The module
manufacturer must state how control of the product into which the modular
transmitter will be installed will be maintained such that full compliance of
the product is always ensured. For additional hosts other than the specific
host originally granted with a limited module, a Class II permissive change is
required on the module grant to register the additional host as a specific
host also approved with the module. Explanation: The module is not a
limited module.
Trace antenna designs
For a modular transmitter with trace antenna designs, see the guidance in
Question 11 of KDB Publication 996369 D02 FAQ – Modules for Micro-Strip
Antennas and traces. The integration information shall include for the TCB
review the integration instructions for the following aspects:layout of trace
design, parts list (BOM), antenna, connectors, and isolation requirements.
-
Information that includes permitted variances (e.g., trace boundary limits, thickness, length, width, shape(s), dielectric constant, and impedance as applicable for each type of antenna);
-
Each design shall be considered a different type (e.g., antenna length in multiple(s) of frequency,
the wavelength, and antenna shape (traces in phase) can affect antenna gain and must be considered); -
The parameters shall be provided in a manner permitting host manufacturers to design the printed circuit (PC) board layout;
-
Appropriate parts by manufacturer and specifications;
-
Test procedures for design verification; and
-
Production test procedures for ensuring compliance. The module grantee shall provide a notice that any deviation(s) from the defined parameters of the antenna trace, as described by the instructions, require that the host product manufacturer must notify the module grantee that they wish to change the antenna trace design. In this case, a Class II permissive change application is required to be filed by the grantee, or the host manufacturer can take responsibility through the change in FCC ID (new application) procedure followed by a Class II permissive change application. Explanation: Yes, The module with trace antenna designs, and This manual has been shown the layout of trace design, antenna, connectors, and isolation requirements.
RF exposure considerations
It is essential for module grantees to clearly and explicitly state the RF
exposure conditions that permit a host product manufacturer to use the module.
Two types of instructions are required for RF exposure information: to the
host product manufacturer, to define the application conditions (mobile,
portable – xx cm from a person’s body); and additional text needed for the
host product manufacturer to provide to end users in their end-product
manuals. If RF exposure statements and use conditions are not provided, then
the host product manufacturer is required to take responsibility of the module
through a change in FCC ID (new application).
Explanation: This module complies with FCC RF radiation exposure limits set
forth for an uncontrolled environment, This equipment should be installed and
operated with a minimum distance of 20 centimeters between the radiator and
your body.” This module is designed to comply with the FCC statement, FCC ID
is: A3LWCA735M.
Antennas
A list of antennas included in the application for certification must be
provided in the instructions. For modular transmitters approved as limited
modules, all applicable professional installer instructions must be included
as part of the information to the host product manufacturer. The antenna list
shall also identify the antenna types (monopole, PIFA, dipole, etc. (note that
for example an “omni-directional antenna” is not considered to be a specific
“antenna type”)). For situations where the host product manufacturer is
responsible for an external connector, for example with an RF pin and antenna
trace design, the integration instructions shall inform the installer that
unique antenna connector must be used on the Part 15 authorized transmitters
used in the host product. The module manufacturers shall provide a list of
acceptable unique connectors.
Explanation: The EUT has a Chip Antenna, and the antenna use a
permanently attached antenna which is unique.
Label and compliance information
Grantees are responsible for the continued compliance of their modules to
the FCC rules. This includes advising host product manufacturers that they
need to provide a physical or e-label stating “Contains FCC ID” with their
finished product. See Guidelines for Labeling and User Information for RF
Devices – KDB Publication 784748. Explanation: The host system using this
module, should have label in a visible area indicated the
following texts: “Contains FCC ID: A3LWCA735M, Contains IC: 649E-WCA735M”
Information on test modes and additional testing requirements5
Additional guidance for testing host products is given in KDB Publication
996369 D04 Module Integration Guide. Test modes should take into consideration
different operational conditions for a stand-alone modular transmitter in a
host, as well as for multiple simultaneously transmitting modules or other
transmitters in a host product. The grantee should provide information on how
to configure test modes for host product evaluation for different operational
conditions for a stand-alone modular transmitter in a host, versus with
multiple, simultaneously transmitting modules or other transmitters in a host.
Grantees can increase the utility of their modular transmitters by providing
special means, modes, or instructions that simulates or characterizes a
connection by enabling a transmitter. This can greatly simplify a host
manufacturer’s determination that a module as installed in a host complies
with FCC requirements. Explanation: Top band can increase the utility of our
modular transmitters by providing instructionsthat simulates or characterizes
a connection by enabling a transmitter.
Additional testing, Part 15 Subpart B disclaimer
The grantee should include a statement that the modular transmitter is only
FCC authorized for the specific rule parts (i.e., FCC transmitter rules)
listed on the grant, and that the host product manufacturer is responsible for
compliance to any other FCC rules that apply to the host not covered by the
modular transmitter grant of certification. If the grantee markets their
product as being Part 15 Subpart B compliant (when it also contains
unintentional-radiator digital circuity), then the grantee shall provide a
notice stating that the final host product still requires Part 15 Subpart B
compliance testing with the modular transmitter installed.
Explanation: The module without unintentional-radiator digital circuity, so
the module does not
require an evaluation by FCC Part 15 Subpart B. The host shoule be evaluated
by the FCC Subpart B.